String Ensemble,String Trio Cello,Viola,Violin - Level 3 - Digital Download SKU: A0.649579 Composed by Bela Bartok. Arranged by Nick Lacanski. 20th Century,Instructional,Standards. Score and parts. 15 pages. Theupperstaff #6221937. Published by theupperstaff (A0.649579). These three trios come from Bartok’s collection, First Term at at the Piano. Besides being great teaching pieces for the instrumentalist, they are just as valuable for study from a compositional tool. Thank you for looking.